Summary of Significant Accounting Policies - Accounts Receivable (Details) - USD ($) |
3 Months Ended | 12 Months Ended | |
|---|---|---|---|
Mar. 31, 2017 |
Mar. 31, 2016 |
Dec. 31, 2016 |
|
| Allowance for Doubtful Accounts Receivable [Roll Forward] | |||
| Balance, Period Start | $ 5,312,466 | $ 3,947,432 | $ 3,947,432 |
| Additions charged to expense | (40,446) | $ 23,543 | 1,968,001 |
| Deductions for uncollectible receivables written off | (602,967) | ||
| Balance, Period End | $ 5,272,020 | $ 5,312,466 | |
| X | ||||||||||
- Definition For an unclassified balance sheet, a valuation allowance for receivables due a company that are expected to be uncollectible. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period. No definition available.
|
| X | ||||||||||
- Definition Amount of direct write-downs of accounts receivable charged against the allowance. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition Amount of expense related to write-down of receivables to the amount expected to be collected. Includes, but is not limited to, accounts receivable and notes receivable. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|